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Real-time multiplicity counter

a counter and real-time technology, applied in the field of neutron multiplicity counting techniques, can solve the problem of limited latch time of the counter, and achieve the effect of high ra

Active Publication Date: 2010-07-13
LAWRENCE LIVERMORE NAT SECURITY LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a digital data acquisition unit that can collect and process large volumes of data quickly and in real-time. The unit uses a multi-detector array and a digital word to collect data, which is then preprocessed and stored for further analysis. This technique minimizes latency and allows for the simultaneous use of the data in several different forms, making it easier to analyze and use. The invention is useful for high-speed processing of digital data and is particularly useful for non-destructive assaying of nuclear material."

Problems solved by technology

Latency is therefore limited to the latch time in the counter.

Method used

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Examples

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Embodiment Construction

[0054]The invention is a digital data acquisition method and apparatus that collects data at high rate and in real-time preprocesses large volumes of data into directly useable forms. To explain the invention, an exemplary neutron detector system is provided for making measurements on samples that contain fissile material. As shown in the neutron counting requirements matrix of FIG. 1, the system operates in two different modes and performs several classes of measurements. FIG. 16 is a flow chart of an embodiment the present method of event counting comprising: inputting edge triggered input signals into parallel input circuits observing each event to be counted; creating a clock to control a minimum summing interval wherein data is collected (counted), for use by a parallel set of means for adding, wherein each input circuit is operatively connected to multiple private (independent) means for adding of said parallel set; reading a sum in each said means for adding during said minim...

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Abstract

A neutron multi-detector array feeds pulses in parallel to individual inputs that are tied to individual bits in a digital word. Data is collected by loading a word at the individual bit level in parallel. The word is read at regular intervals, all bits simultaneously, to minimize latency. The electronics then pass the word to a number of storage locations for subsequent processing, thereby removing the front-end problem of pulse pileup.

Description

[0001]This application is a continuation-in-part of U.S. application Ser. No. 11 / 257,607, filed Oct. 24, 2005 now abandoned, incorporated herein by reference, which claims the benefit of U.S. Provisional Application No. 60 / 621,105, filed Oct. 22, 2004, incorporated herein by reference.[0002]The United States Government has rights in this invention pursuant to Contact No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC.BACKGROUND OF THE INVENTION[0003]1. Field of the Invention[0004]The present invention relates neutron multiplicity counting techniques, and more specifically, it relates to such a neutron multiplicity counting technique that reduces pulse pile up dead time.[0005]2. Description of Related Art[0006]The standard approach to neutron multiplicity counting is through the use of a “shift register” sliding word that is gated and counted repeatedly. Usually this gives data for one gate width. The shift register is a...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G01T3/00G06M11/00G21C17/00
CPCG01T3/00H01J47/12
Inventor ROWLAND, MARK S.ALVAREZ, RAYMOND A.
Owner LAWRENCE LIVERMORE NAT SECURITY LLC